<?php
////////////////////////////////////////////////////////////////////////////////////////////////
// PDF_Label 
//
// Class to print labels in Avery or custom formats
//
// Copyright (C) 2003 Laurent PASSEBECQ (LPA)
// Based on code by Steve Dillon: steved@mad.scientist.com
//
//---------------------------------------------------------------------------------------------
// VERSIONS:
// 1.0: Initial release
// 1.1: + Added unit in the constructor
//      + Now Positions start at (1,1).. then the first label at top-left of a page is (1,1)
//      + Added in the description of a label:
//           font-size : defaut char size (can be changed by calling Set_Char_Size(xx);
//           paper-size: Size of the paper for this sheet (thanx to Al Canton)
//           metric    : type of unit used in this description
//                       You can define your label properties in inches by setting metric to
//                       'in' and print in millimiters by setting unit to 'mm' in constructor
//        Added some formats:
//           5160, 5161, 5162, 5163, 5164: thanx to Al Canton: acanton@adams-blake.com
//           8600                        : thanx to Kunal Walia: kunal@u.washington.edu
//      + Added 3mm to the position of labels to avoid errors 
// 1.2: = Bug of positioning
//      = Set_Font_Size modified -> Now, just modify the size of the font
// 1.3: + Labels are now printed horizontally
//      = 'in' as document unit didn't work
////////////////////////////////////////////////////////////////////////////////////////////////

/**
 * PDF_Label - PDF label editing
 * @package PDF_Label
 * @author Laurent PASSEBECQ <lpasseb@numericable.fr>
 * @copyright 2003 Laurent PASSEBECQ
**/

require_once('fpdf.php');

class PDF_Label extends FPDF {

    // Private properties
    var $_Margin_Left;            // Left margin of labels
    var $_Margin_Top;            // Top margin of labels
    var $_X_Space;                // Horizontal space between 2 labels
    var $_Y_Space;                // Vertical space between 2 labels
    var $_X_Number;                // Number of labels horizontally
    var $_Y_Number;                // Number of labels vertically
    var $_Width;                // Width of label
    var $_Height;                // Height of label
    var $_Line_Height;            // Line height
    var $_Padding;                // Padding
    var $_Metric_Doc;            // Type of metric for the document
    var $_COUNTX;                // Current x position
    var $_COUNTY;                // Current y position

    // List of label formats
    var $_Avery_Labels = array(
        '5160' => array('paper-size'=>'letter',    'metric'=>'mm',    'marginLeft'=>1.762,    'marginTop'=>10.7,        'NX'=>3,    'NY'=>10,    'SpaceX'=>3.175,    'SpaceY'=>0,    'width'=>66.675,    'height'=>25.4,        'font-size'=>8),
        '5161' => array('paper-size'=>'letter',    'metric'=>'mm',    'marginLeft'=>0.967,    'marginTop'=>10.7,        'NX'=>2,    'NY'=>10,    'SpaceX'=>3.967,    'SpaceY'=>0,    'width'=>101.6,        'height'=>25.4,        'font-size'=>8),
        '5162' => array('paper-size'=>'letter',    'metric'=>'mm',    'marginLeft'=>0.97,        'marginTop'=>20.224,    'NX'=>2,    'NY'=>7,    'SpaceX'=>4.762,    'SpaceY'=>0,    'width'=>100.807,    'height'=>35.72,    'font-size'=>8),
        '5163' => array('paper-size'=>'letter',    'metric'=>'mm',    'marginLeft'=>1.762,    'marginTop'=>10.7,         'NX'=>2,    'NY'=>5,    'SpaceX'=>3.175,    'SpaceY'=>0,    'width'=>101.6,        'height'=>50.8,        'font-size'=>8),
        '5164' => array('paper-size'=>'letter',    'metric'=>'in',    'marginLeft'=>0.148,    'marginTop'=>0.5,         'NX'=>2,    'NY'=>3,    'SpaceX'=>0.2031,    'SpaceY'=>0,    'width'=>4.0,        'height'=>3.33,        'font-size'=>12),
        '8600' => array('paper-size'=>'letter',    'metric'=>'mm',    'marginLeft'=>6.5,         'marginTop'=>19,         'NX'=>3,     'NY'=>10,     'SpaceX'=>9.5,         'SpaceY'=>3.1,     'width'=>66.6,         'height'=>25.4,        'font-size'=>8),
        'L7160' => array('paper-size'=>'A4',    'metric'=>'mm',    'marginLeft'=>6,         'marginTop'=>15,         'NX'=>3,     'NY'=>7,     'SpaceX'=>5,         'SpaceY'=>0,     'width'=>63.5,         'height'=>38,        'font-size'=>10),
        'L7163'=> array('paper-size'=>'A4',        'metric'=>'mm',    'marginLeft'=>5,        'marginTop'=>15,         'NX'=>2,    'NY'=>7,    'SpaceX'=>25,        'SpaceY'=>0,    'width'=>99.1,        'height'=>38.1,        'font-size'=>9)
    );

    // Constructor
    function PDF_Label($format, $unit='mm', $posX=1, $posY=1) {
        if (is_array($format)) {
            // Custom format
            $Tformat = $format;
        } else {
            // Built-in format
            if (!isset($this->_Avery_Labels[$format]))
                $this->Error('Unknown label format: '.$format);
            $Tformat = $this->_Avery_Labels[$format];
        }

        parent::FPDF('P', $unit, $Tformat['paper-size']);
        $this->_Metric_Doc = $unit;
        $this->_Set_Format($Tformat);
        $this->SetFont('Arial');
        $this->SetMargins(0,0); 
        $this->SetAutoPageBreak(false); 
        $this->_COUNTX = $posX-2;
        $this->_COUNTY = $posY-1;
    }

    function _Set_Format($format) {
        $this->_Margin_Left    = $this->_Convert_Metric($format['marginLeft'], $format['metric']);
        $this->_Margin_Top    = $this->_Convert_Metric($format['marginTop'], $format['metric']);
        $this->_X_Space     = $this->_Convert_Metric($format['SpaceX'], $format['metric']);
        $this->_Y_Space     = $this->_Convert_Metric($format['SpaceY'], $format['metric']);
        $this->_X_Number     = $format['NX'];
        $this->_Y_Number     = $format['NY'];
        $this->_Width         = $this->_Convert_Metric($format['width'], $format['metric']);
        $this->_Height         = $this->_Convert_Metric($format['height'], $format['metric']);
        $this->Set_Font_Size($format['font-size']);
        $this->_Padding        = $this->_Convert_Metric(3, 'mm');
    }

    // convert units (in to mm, mm to in)
    // $src must be 'in' or 'mm'
    function _Convert_Metric($value, $src) {
        $dest = $this->_Metric_Doc;
        if ($src != $dest) {
            $a['in'] = 39.37008;
            $a['mm'] = 1000;
            return $value * $a[$dest] / $a[$src];
        } else {
            return $value;
        }
    }

    // Give the line height for a given font size
    function _Get_Height_Chars($pt) {
        $a = array(6=>2, 7=>2.5, 8=>3, 9=>4, 10=>5, 11=>6, 12=>7, 13=>8, 14=>9, 15=>10);
        if (!isset($a[$pt]))
            $this->Error('Invalid font size: '.$pt);
        return $this->_Convert_Metric($a[$pt], 'mm');
    }

    // Sets the character size
    // This changes the line height too
    function Set_Font_Size($pt) {
        $this->_Line_Height = $this->_Get_Height_Chars($pt);
        $this->SetFontSize($pt);
    }

    // Print a label
    function Add_Label($text) {
        $this->_COUNTX++;
        if ($this->_COUNTX == $this->_X_Number) {
            // Row full, we start a new one
            $this->_COUNTX=0;
            $this->_COUNTY++;
            if ($this->_COUNTY == $this->_Y_Number) {
                // End of page reached, we start a new one
                $this->_COUNTY=0;
                $this->AddPage();
            }
        }

        $_PosX = $this->_Margin_Left + $this->_COUNTX*($this->_Width+$this->_X_Space) + $this->_Padding;
        $_PosY = $this->_Margin_Top + $this->_COUNTY*($this->_Height+$this->_Y_Space) + $this->_Padding;
        $this->SetXY($_PosX, $_PosY);
        $this->MultiCell($this->_Width, $this->_Line_Height, $text);
    }

}
?>